HELP
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- Posts: 193
- Joined: 27 Jul 2007, 15:29
- Job Title: Lab technician
- School: The Illawarra Grammar School
- Suburb: Figtree
- State/Location: NSW
HELP
Hi gang in lab land,
I am trying to make those heat conduction metal rod things with globs of wax on them, and can't get the wax to stay on the rods!!! Is there a trick to this?
Needed by last lesson today!!
Grateful for any help.
Ellice.
I am trying to make those heat conduction metal rod things with globs of wax on them, and can't get the wax to stay on the rods!!! Is there a trick to this?
Needed by last lesson today!!
Grateful for any help.
Ellice.
Re: HELP
They use drawing pins stuck on with vaseline here. So when the rod heats up the pin drops off. I keep the same drawing pins from year to year in a specimen container as they have vaseline on them, but of course you could use new ones. But the teacher gets the students to stick 'em on as part of the experiment.
- lurra
- Posts: 114
- Joined: 23 Mar 2011, 07:54
- Job Title: Lab Tech
- School: Greystanes High School
- Suburb: Greystanes
- State/Location: NSW
Re: HELP
I have the ready made ones that you put the wax beads on and put over the bursen burner they work great.
Lurra AKA Noona
Rosalie Cassar
Lab Tech
Greystanes H S
ROSALIE.CASSAR@det.nsw.edu.au
Rosalie Cassar
Lab Tech
Greystanes H S
ROSALIE.CASSAR@det.nsw.edu.au
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- Posts: 578
- Joined: 28 Jan 2021, 13:24
- Job Title: Lab Assistant
- School: MCS
- State/Location: NSW
Re: HELP
Does anyone use the conductivity stars? They have little wells at the end of each metal rod for wax. I’m just wondering what methods you use to get the wax in there? Do you just scrape a bit off the cube of wax that comes with them? They are tiny!
Re: HELP
Hi Rosaliel,
We use Paraffin wax pellets (beaded) from Chem-Supply PT200-500G, the pellets fit nicely in the wells of the conductivity stars. I scrape the wax of the wells after they have been used so that they are clean for the next class.
We use Paraffin wax pellets (beaded) from Chem-Supply PT200-500G, the pellets fit nicely in the wells of the conductivity stars. I scrape the wax of the wells after they have been used so that they are clean for the next class.
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- Posts: 894
- Joined: 15 Dec 2015, 10:49
- Job Title: Lab Technician
- School: FCAC
- State/Location: QLD
Re: HELP
Just be careful , they weren't all created equally .
we had an old IEC one which we would stick a Bunsen burner under ....it worked fine .
Got some from Serrata and missed the fine print where it said " don't use on a Bunsen , use a spirit lamp " .....they melted
regarding the wax .
When we had one as a teacher demo , we ( I) would stand a match stick in each wax well ( melted in with wax) . The kids could see which order the matches fell . Now we have a class set , the kids just watch and observe the wax as it melts . We have pellets . Some teachers prefer to hand out fresh pellets with each unit , some just say there's enough wax already there for the kids to see melt .
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- Posts: 39
- Joined: 29 Jul 2011, 12:21
- State/Location: NSW
Re: HELP
Hi everyone,
I'm looking for something to put on the end of our metal conductions stars that won't smoke too much. I've tried candle wax, vaseline and plasticine but all end up smoking a lot before the end of the experiment, even though small amounts are used. Any thoughts?
Thanks
I'm looking for something to put on the end of our metal conductions stars that won't smoke too much. I've tried candle wax, vaseline and plasticine but all end up smoking a lot before the end of the experiment, even though small amounts are used. Any thoughts?
Thanks
Re: HELP
I've only ever used candle wax to hold paperclips on. My problem is metal conduction stars just about to try ordering some more; ones without zinc and fixed so they can't spin them. I've tried so many different ones. Going to give the Westlab ones a go.
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- Posts: 894
- Joined: 15 Dec 2015, 10:49
- Job Title: Lab Technician
- School: FCAC
- State/Location: QLD
Re: HELP
Metho is fine Rosalie .
Trick is getting the right distance between the spirit burner flame and the star . Blocks of wood etc work but are a pain .
We ended up getting some adjustable jacks to lift the burners up under the tripods .
You can buy them from usual suppliers for about $70 .-$100 each .
I found some on eBay for $20 each work really well .
Trick is getting the right distance between the spirit burner flame and the star . Blocks of wood etc work but are a pain .
We ended up getting some adjustable jacks to lift the burners up under the tripods .
You can buy them from usual suppliers for about $70 .-$100 each .
I found some on eBay for $20 each work really well .